iankelling.org Git - distro-setup/blob - switch-primary-host

   1 #!/bin/bash
   2
   3 # this pulls from host $1 to the current host.
   4 # not currently used, but it might be useful at some point
   5
   6 source /a/bin/errhandle/errcatch-function
   7 source /a/bin/errhandle/bash-trace-function
   8 errcatch
   9
  10 cd /
  11
  12 old=$1
  13 new=$HOSTNAME
  14
  15 if [[ ! $old ]]; then
  16     echo "$0: error: no \$1 given, should be old host"
  17     exit 1
  18 fi
  19
  20 if ! timeout -s 9 2 ssh $old : ; then
  21     echo "$0: error: can't ssh to $old"
  22 fi
  23
  24 for p in emacs firefox pidgin; do
  25     ssh $old killall $p ||:
  26 done
  27
  28 # note: duplicated in check-subvol-stale
  29 last_a=$(
  30     vol=a
  31     for s in /mnt/root/btrbk/$vol.*; do
  32         f=${s##*/}
  33         unix_time=$(date -d $(sed -r  's/(.{4})(..)(.{5})(..)(.*)/\1-\2-\3:\4:\5/' <<<${f#$vol.}) +%s)
  34         printf "%s\n" $unix_time
  35     done | sort -r | head -n 1
  36       )
  37
  38 if [[ $last_a != [0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9] ]]; then
  39     echo "$0: error: last_a bad value: $last_a"
  40     exit 1
  41 fi
  42
  43 # if last_a is recent enough, skip doing btrbk
  44 if  (( last_a < $(date +%s) - 60*60 )); then
  45     if ! ssh $old btrbk-run -pvt $new; then
  46         echo "$0: error: failed btrbk-run"
  47         exit 1
  48     fi
  49 fi
  50
  51 switch-mail-host $old $new